No, they don't, and no, he probably won't. We're talking about the pre-'66 speedo drive pinions. They're much smaller than the '66-up pinions, and even when they were easy to get—which they haven't been for many years—there weren't many options. Smaller pinion diameter + coarser tooth pitch = very narrow range of available tooth counts. Specifically, the range with the pre-'66 pinions was 16 to 21 teeth (six options). Compare that to the '66-up range of 21 to 45 teeth (twenty-five options, that's over four times as many).